import React, { Component } from 'react'
//引入store，用于获取redux中保存状态
import store from '../../redux/store'
//映入action
import {createIncrementAction,createDecrementAction} from '../../redux/count_action'

export default class Count extends Component {

	//state = {count:0}
//    componentDidMount(){
//     console.log(store.getState())
//     store.subscribe(()=>{
//         this.setState({})
//     })
//    }
	//加法
	increment = ()=>{
		const {value} = this.selectNumber
        store.dispatch(createIncrementAction(value*1))
        
	}
	//减法
	decrement = ()=>{
		const {value} = this.selectNumber
        
        store.dispatch(createDecrementAction(value*1))
	}
	//奇数再加
	incrementIfOdd = ()=>{
		const {value} = this.selectNumber
		if(value % 2 !== 0){
            store.dispatch(createIncrementAction(value*1))
		}
	}
	//异步加
	incrementAsync = ()=>{
		const {value} = this.selectNumber
		setTimeout(()=>{
            store.dispatch(createIncrementAction(value*1))
		},500)
	}

	render() {
		return (
			<div>
				<h1>当前求和为：{store.getState()}</h1>
				<select ref={c => this.selectNumber = c}>
					<option value="1">1</option>
					<option value="2">2</option>
					<option value="3">3</option>
				</select>&nbsp;
				<button onClick={this.increment}>+</button>&nbsp;
				<button onClick={this.decrement}>-</button>&nbsp;
				<button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
				<button onClick={this.incrementAsync}>异步加</button>&nbsp;
			</div>
		)
	}
}
